U.S. patent number 7,740,321 [Application Number 11/433,891] was granted by the patent office on 2010-06-22 for suspended pixelated seating structure.
This patent grant is currently assigned to Herman Miller, Inc.. Invention is credited to John F. Aldrich, Ryan S. Brill, Timothy P. Coffield, Christopher C. Hill, Andrew J. Kurrasch, Matthew Parkinson, Matthew P. Reed, James D. Slagh, Douglas M. VanDeRiet, Jeffrey A. Weber.
United States Patent |
7,740,321 |
Brill , et al. |
June 22, 2010 |
Suspended pixelated seating structure
Abstract
A suspended pixelated seating structure provides ergonomic,
adaptable seating support. The suspended pixelated seating
structure includes multiple cooperative layers to maximize global
comfort and support while enhancing adaptation to localized
variations in a load, such as in the load applied when a person
sits in a chair. The cooperative layers each use independent
elements such as pixels, springs, support rails, and other elements
to provide this adaptable comfort and support. The suspended
pixelated seating structure also uses aligned material to provide a
flexible yet durable suspended seating structure. Accordingly, the
suspended pixelated seating structure provides maximum comfort for
a wide range of body shapes and sizes.
Inventors: |
Brill; Ryan S. (Allendale,
MI), VanDeRiet; Douglas M. (Holland, MI), Aldrich; John
F. (Grandville, MI), Hill; Christopher C. (Zeeland,
MI), Kurrasch; Andrew J. (Saugatuck, MI), Slagh; James
D. (Holland, MI), Parkinson; Matthew (State College,
PA), Reed; Matthew P. (Ann Arbor, MI), Weber; Jeffrey
A. (Golden Valley, MN), Coffield; Timothy P. (Grand
Rapids, MI) |
Assignee: |
Herman Miller, Inc. (Zeeland,
MI)
|
Family
ID: |
38684456 |
Appl.
No.: |
11/433,891 |
Filed: |
May 12, 2006 |
Prior Publication Data
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Document
Identifier |
Publication Date |
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US 20070262634 A1 |
Nov 15, 2007 |
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Current U.S.
Class: |
297/452.49;
297/452.62; 297/284.3 |
Current CPC
Class: |
A47C
23/002 (20130101); A47C 7/28 (20130101) |
Current International
Class: |
A47C
7/35 (20060101); A47C 7/02 (20060101) |
Field of
Search: |
;297/452.49,452.56,452.63,284.3 ;5/719,247,255 |
References Cited
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|
Primary Examiner: Dunn; David
Assistant Examiner: Alex; James
Attorney, Agent or Firm: Brinks Hofer Gilson & Lione
Claims
We claim:
1. A suspended pixelated seating structure comprising: a macro
compliance layer comprising: a first support structure frame
attachment; a second support structure frame attachment, the first
and second support structure frame attachments each comprising
multiple frame connectors for connecting the macro compliance layer
to a support structure frame; multiple primary support rails
extending substantially linearly between the first and second
support structure frame attachments, where each of the multiple
primary support rails are arranged substantially in parallel to
each other of the multiple primary support rails; multiple aligned
regions discretely defined along the multiple primary support
rails, where each of the multiple aligned regions comprise one of a
compression aligned region or a tension aligned region; and
multiple unaligned regions defined along the multiple primary
support rails, where the unaligned regions separate adjacent
aligned regions along a length of each of the multiple primary
support rails, where the multiple primary support rails, multiple
aligned and unaligned regions, first support structure frame
attachment, and second support structure frame attachment comprise
an elastomeric material and are integrally molded as a single
unitary macro compliance layer; a micro compliance layer above the
macro compliance layer, the micro compliance layer comprising
multiple spring elements, where each spring element is coupled to
at least one unaligned region of the multiple primary support
rails; and a load support layer supported by the micro compliance
layer, the load support layer comprising multiple pixels positioned
above and supported by the multiple spring elements.
2. The suspended pixelated seating structure of claim 1, further
comprising a seat covering layer secured above the load support
layer.
3. The suspended pixelated seating structure of claim 1, each
primary support rail comprising multiple secondary supports
extending out from the primary support rail.
4. The suspended pixelated seating structure of claim 1, the
multiple pixels comprising multiple pixel connectors.
5. The suspended pixelated seating structure of claim 4, the
multiple pixel connectors comprising multiple bridged connectors,
the multiple bridged connectors comprising: a first U-shaped bend
connected between adjacent multiple pixels; a second U-shaped bend
connected between adjacent multiple pixels; and a strip connected
between the first and the second U-shaped bends.
6. The suspended pixelated seating structure of claim 1, the
multiple spring elements comprising: a top; and a deflectable
member, the deflectable member comprising multiple spiraled
arms.
7. The suspended pixelated seating structure of claim 1, the
multiple pixels defined as multiple contoured pixels.
8. The suspended pixelated seating structure of claim 1 further
comprising multiple bolstering support members connected between
the macro compliance layer and the micro compliance layer, each of
the multiple bolstering support members comprising an angled
pad.
9. The suspended pixelated seating structure of claim 1, the macro
compliance layer comprising: a first region pre-loaded by a first
pre-load characteristic; and a second region pre-loaded by a second
pre-load characteristic that is distinct from the first pre-load
characteristic.
10. The suspended pixelated seating structure of claim 1, the macro
compliance layer further comprising multiple strands, each
extending between an unaligned region of a first primary support
rail to an unaligned region of a second primary support rail that
is adjacent to the first primary support rail.
11. The suspended pixelated seating structure of claim 1, where
each unaligned region between adjacent aligned regions comprises a
width that is wider than a width of either of the adjacent aligned
regions.
12. The suspended pixelated seating structure of claim 1, where
alternating aligned and unaligned regions form the multiple primary
support rails.
13. The suspended pixilated seating structure of claim 1, where
each of the multiple aligned regions comprises a tension aligned
region.
14. The suspended pixilated seating structure of claim 1, where
each of the multiple aligned regions comprises a compression
aligned region.
15. A suspended pixelated seating structure comprising: a macro
compliance layer comprising: a first support structure frame
attachment; a second support structure frame attachment; multiple
primary support rails extending substantially linearly between the
first and second support structure frame attachments, where each of
the multiple primary support rails are arranged substantially in
parallel to each other of the multiple primary support rails; and
multiple aligned regions discretely defined along the multiple
primary support rails, where each of the multiple aligned regions
comprise one of a compression aligned region or a tension aligned
region; and multiple nodes defined along the multiple primary
support rails between adjacent aligned regions; a micro compliance
layer supported by the primary support rails, the micro compliance
layer comprising individually tuned springs defining a first
regional response zone and a second regional response zone with
different load support characteristics, where each individually
tuned spring is coupled to at least one node of the primary support
rails; and a load support layer supported by the micro compliance
layer, the load support layer comprising interconnected individual
pixels positioned above the individually tuned springs.
16. The suspended pixelated seating structure of claim 15, the
macro compliance layer further comprising multiple secondary
supports extending from the primary support rails, where micro
compliance layer is further supported by the multiple secondary
supports.
17. The suspended pixelated seating structure of claim 15, the
individually tuned springs comprising: a top; and a deflectable
member connected to the top.
18. The suspended pixelated seating structure of claim 17, the
deflectable member comprising at least one spiraled arm.
19. The suspended pixelated seating structure of claim 15, where
the multiple primary support rails, multiple aligned regions,
multiple nodes, first support structure frame attachment, and
second support structure frame attachment are integrally molded
from an elastomeric material as a single unitary macro compliance
layer.
20. The suspended pixelated seating structure of claim 15, the
macro compliance layer comprising: a first region pre-loaded by a
first pre-load characteristic; and a second region pre-loaded by a
second pre-load characteristic that is distinct from the first
pre-load characteristic.
21. The suspended pixelated seating structure of claim 15, the
macro compliance layer further comprising multiple strands, each
extending between a node of a first primary support rail to a node
of a second primary support rail that is adjacent to the first
primary support rail.
22. The suspended pixelated seating structure of claim 15, where
the multiple nodes are unaligned regions defined between adjacent
aligned regions.
23. The suspended pixelated seating structure of claim 15, where
alternating aligned regions and nodes form the multiple primary
support rails.
24. The suspended pixilated seating structure of claim 15, where
each of the multiple aligned regions comprises a tension aligned
region.
25. The suspended pixilated seating structure of claim 15, where
each of the multiple aligned regions comprises a compression
aligned region.
26. A suspended pixelated seating structure comprising: a macro
compliance layer comprising: a first support structure frame
attachment; a second support structure frame attachment; multiple
primary support rails, extending substantially linearly between the
first and second support structure frame attachments, where each of
the multiple primary support rails are arranged substantially in
parallel to each other of the multiple primary support rails;
multiple aligned regions discretely defined along the multiple
primary support rails, where each of the multiple aligned regions
comprise one of a compression aligned region or a tension aligned
region; and multiple nodes defined along the multiple primary
support rails between adjacent aligned regions; a micro compliance
layer above the macro compliance layer, the micro compliance layer
comprising springs, where each spring is coupled to at least one
node of the primary support rails; and a load support layer
supported by the micro compliance layer, the load support layer
comprising multiple pixels positioned above and supported by the
multiple spring elements, where the pixels comprise: stems
extending downwardly to contact the springs; openings in the pixels
to facilitate pixel flexibility; and multiple pixel connectors for
interconnecting the multiple pixels.
27. The suspended pixelated seating structure of claim 26, where
the multiple primary support rails, multiple aligned regions,
multiple nodes, first support structure frame attachment, and
second support structure frame attachment are integrally molded
from an elastomeric material as a single unitary macro compliance
layer.
28. The suspended pixelated seating structure of claim 26, where
each of the springs comprise at least one spiraled arm.
29. The suspended pixelated seating structure of claim 26, the
macro compliance layer comprising: a first region pre-loaded by a
first pre-load characteristic; and a second region pre-loaded by a
second pre-load characteristic that is distinct from the first
pre-load characteristic.
30. The suspended pixelated seating structure of claim 26, the
macro compliance layer further comprising multiple strands, each
extending between a node of a first primary support rail to a node
of a second primary support rail that is adjacent to the first
primary support rail.
31. The suspended pixelated seating structure of claim 26, where
the multiple nodes are unaligned regions defined between adjacent
aligned regions.
32. The suspended pixelated seating structure of claim 26, where
alternating aligned regions and nodes form the multiple primary
support rails.
33. The suspended pixilated seating structure of claim 26, where
each of the multiple aligned regions comprises a tension aligned
region.
34. The suspended pixilated seating structure of claim 26, where
each of the multiple aligned regions comprises a compression
aligned region.
Description
BACKGROUND OF THE INVENTION
1. Technical Field
The invention relates to load support structures. In particular,
the invention relates to suspended pixelated seating
structures.
2. Related Art
Most people spend a significant amount of time sitting each day.
Inadequate support can result in reduced productivity, body
fatigue, or even adverse health conditions such as chronic back
pain. Extensive resources have been devoted to research and
development of chairs, benches, mattresses, sofas, and other load
support structures.
In the past, for example, chairs have encompassed designs ranging
from cushions to more complex combinations of individual load
bearing elements. These past designs have improved the general
comfort level provided by seating structures, including providing
form fitting comfort for a user's general body shape. Some
discomfort, however, may still arise even from the improved seating
structures. For example, a seating structure, though tuned to
conform to a wide variety of general body shapes, may resist
conforming to a protruding wallet, butt bone, or other local
irregularity in body shape. This may result in discomfort as the
seating structure presses the wallet or other body shape
irregularity up into the seated person's backside.
Thus, while some progress has been made in providing comfortable
seating structures, there remains a need for improved seating
structures tuned to fit and conform to a wide range of body shapes
and sizes.
SUMMARY
A suspended pixelated seating structure provides comfortable and
durable seating support. The suspended pixelated seating structure
includes multiple cooperative layers to maximize global comfort and
support while enhancing adaptation to localized irregularities in
body shape. The cooperative layers each use independent elements
such as pixels, springs, support rails, and other elements to
provide significant comfort for localized protrusions or
irregularities, as well as for general or more uniform
characteristics, in an applied load, such as that applied when a
person sits in a chair. The suspended pixelated seating structure
also uses aligned material to provide a flexible yet durable
seating structure. In this manner each portion of the suspended
pixelated seating structure may independently conform to and
support non-uniform shapes, sizes, weights, and other load
characteristics.
The suspended pixelated seating structure may include a macro
compliance layer, a micro compliance layer, and a load support
layer. The macro compliance layer provides controlled deflection of
the seating structure upon application of a load. The macro
compliance layer includes multiple primary support rails which also
support the micro compliance layer. The macro compliance layer may
also include multiple tensile expansion members which may include
an aligned material to facilitate deflection of the macro
compliance layer when a load is imposed. The macro compliance layer
further includes multiple expansion control strands connected
between the multiple primary support rails. As the tensile
expansion members facilitate deflection of the macro compliance
layer, the expansion control strands may inhibit excess deflection.
Accordingly, the suspended pixelated seating structure is tuned to
be highly sensitive and conform to very light loads, while
providing controlled deflection for heavier loads.
The micro compliance layer facilitates added and independent
deflection upon application of a load to the suspended pixelated
seating structure. The micro compliance layer includes multiple
spring elements supported by the multiple primary support rails.
The multiple spring elements each include a top and a deflection
member. Each of the multiple spring elements may independently
deflect under a load based upon a variety of factors, including the
spring type, relative position of the spring element within the
suspended pixelated seating structure, spring material, spring
dimensions, connection type to other elements of the suspended
pixelated seating structure, and other factors.
The load support layer may be the layer upon which a load is
applied. The load support layer includes multiple pixels positioned
above the multiple spring elements. The multiple pixels contact
with the tops of the multiple spring elements. Like the multiple
spring elements, the multiple pixels may also provide a response to
an applied load independent of the responses of adjacent pixel.
Accordingly, the suspended pixelated seating structure includes
cooperative yet independent layers, with each layer including
cooperative yet independent elements, to provide maximized global
support and comfort to an applied load while also adapting to and
supporting localized load irregularities. Further, the load support
independence provided by the suspended pixelated seating structure
allows specific regions to adapt to any load irregularity without
substantially affecting the load support provided by adjacent
regions.
Other systems, methods, features and advantages of the invention
will be, or will become, apparent to one with skill in the art upon
examination of the following figures and detailed description. It
is intended that all such additional systems, methods, features and
advantages be included within this description, be within the scope
of the invention, and be protected by the following claims.
BRIEF DESCRIPTION OF THE DRAWINGS
The invention can be better understood with reference to the
following drawings and description. The components in the figures
are not necessarily to scale, emphasis instead being placed upon
illustrating the principles of the invention. Moreover, in the
figures, like referenced numerals designate corresponding parts
throughout the different views.
FIG. 1 shows a portion of a suspended pixelated seating
structure.
FIG. 2 shows a broader view of the suspended pixelated seating
structure shown in FIG. 1.
FIG. 3 shows the portion of the macro compliance layer shown in
FIG. 1.
FIG. 4 shows a support structure frame attachment including
multiple tensile expansion members.
FIG. 5 shows a four sided tower spring.
FIG. 6 shows the four sided tower spring shown in FIG. 5 deflecting
under a load.
FIG. 7 shows a plot of the approximate spring rate of the four
sided tower spring.
FIG. 8 shows a top view of the macro and micro compliance layers of
a suspended pixelated seating structure including multiple tensile
expansion members defined along the multiple primary support
rails.
FIG. 9 shows a coil spring.
FIG. 10 shows a portion of a suspended pixelated seating structure
where the multiple spring elements are multiple coil springs.
FIG. 11 shows a broader view of the suspended pixelated seating
structure shown in FIG. 10.
FIG. 12 shows a squiggle spring connected between adjacent primary
support rails and adjacent secondary support rails.
FIG. 13 shows the top view of a portion of a suspended pixelated
seating structure where the multiple spring elements are squiggle
springs.
FIG. 14 shows an angled top view of the portion of the suspended
pixelated seating structure shown in FIG. 13.
FIG. 15 shows a portion of a suspended pixelated seating structure
where the micro compliance layer includes two sided tower
springs.
FIG. 16 shows a broader view of the portion of the suspended
pixelated seating structure shown in FIG. 15.
FIG. 17 shows a top view of the suspended pixelated seating
structure shown in FIG. 16.
FIG. 18 shows a side view of the suspended pixelated seating
structure shown in FIG. 16.
FIG. 19 shows a portion of a load support layer 1900 that may be
used in a suspended pixelated seating structure.
FIG. 20 shows a side view of the load support layer shown in FIG.
19.
FIG. 21 shows a load support layer including multiple rectangular
pixels interconnected at their sides via multiple pixel
connectors.
FIG. 22 shows a side view of the load support layer shown in FIG.
21.
FIG. 23 shows a load support layer including multiple contoured
pixels.
FIG. 24 shows an angled view of the load support layer shown in
FIG. 23.
FIG. 25 shows a side view of the load support layer shown in FIGS.
23 and 24.
FIG. 26 shows a close up of one of the contoured pixels shown in
FIGS. 23 and 24.
FIG. 27 shows a side view of a suspended pixelated seating
structure including a bolstering member.
DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS
The suspended pixelated seating structure generally refers to an
assembly of multiple (e.g., three) cooperative layers for
implementation in or as a load bearing structure, such as in a
chair, bed, bench, or other load bearing structures. The
cooperative layers include multiple elements, including multiple
independent elements, to maximize the support and comfort provided.
The extent of the independence exhibited by the multiple elements
may depend upon, or be tuned according to, individual
characteristics of each element, the connection type used to
interconnect the multiple elements, or other the structural or
design characteristics of the suspended pixelated seating
structure. The multiple elements described below may be
individually designed, positioned, or otherwise configured to suit
the load support needs for a particular individual or application.
In addition, the dimensions discussed below with reference to the
various multiple elements are examples only and may vary widely
depending upon the particular desired implementation and on the
factors noted below.
FIG. 1 shows a portion of a suspended pixelated seating structure
100. The suspended pixelated seating structure 100 includes a macro
compliance layer 102, a micro support layer 104, and a load support
layer 106.
The macro compliance layer 102 includes multiple primary support
rails 108, multiple expansion control strands 110, and a support
structure frame attachment 112. Each multiple primary support rail
108 may also include multiple secondary support rails 114 extending
from the primary support rail 108.
The support structure frame attachment 112 may include a frame
attachment rail 116 and multiple frame connectors 118 defined along
the frame attachment rail 116. The support structure frame
attachment 112 also includes multiple rail attachment nodes 120 and
multiple tensile expansion members 122 connected between the
multiple frame connectors 118 and multiple rail attachment nodes
120.
The micro compliance layer 104 includes multiple spring elements
124 above (e.g., supported by or resting on) the multiple primary
support rails 108. Each of the multiple spring elements 124
includes a top 126, a deflectable member 128, and multiple spring
attachment members 130. In FIG. 1 the multiple spring elements 124
are four sided tower springs. The multiple spring elements 124 may
alternatively include a variety of spring types, as is discussed
below.
The load support layer 106 includes multiple pixels 132. Each of
the multiple pixels 132 includes an upper surface 134 and a lower
surface. The lower surface of each of the multiple pixels 132 may
include a stem 136 which contacts with the top 126 of at least one
of the spring elements 124. The multiple pixels 132 may also
include one or more openings 138 defined within the multiple pixels
132. The openings 138 may increase the flexibility of the multiple
pixels 132. The openings 138 may also be positioned and/or defined
to function as ventilation elements to provide aeration to the
suspended pixelated seating structure 100. The openings 138 may
also be positioned and designed for aesthetic appeal. The multiple
pixels 132 may be interconnected with multiple pixel connectors
148.
The macro compliance layer 102 connects to a support structure
frame via the support structure frame attachment 112. The support
structure frame may be the frame of chair, bench, bed, or other
load support structure. As described in this application, the macro
compliance layer 102 may include the support structure frame
attachment 112. In other examples, the support structure frame
attachment 112 may be separate from the macro compliance layer 102.
For example, the support structure frame may alternatively include
the support structure frame attachment 112. In yet other examples,
the suspended pixelated seating structure 100 may omit the support
structure frame attachment 112. FIG. 4 shows a close-up view of the
support structure frame attachment 112.
The frame connectors 118 may define frame attachment openings 140
for connection to the support structure frame. The frame connectors
118 may alternatively include cantilevered elements for securing
the support structure frame attachment 112 to openings defined in
the support structure frame. As another alternative, the support
structure frame attachment 112 may omit the frame attachment rail
116. In this example, the frame connectors 118 may be independent
of the adjacent frame connectors 118, except through their
respective connections to the support structure frame. The support
structure frame attachment 112 may connect to the support structure
frame via a snap fit connection, an integral molding, or other
connection methods.
The support structure frame attachment 112 also includes the
multiple tensile expansion members 122. The multiple tensile
expansion members 122 may connect between the frame attachment rail
116 and the rail attachment nodes 120. The multiple tensile
expansion members 122 are flexible elements with high tensile
strength, allowing the macro compliance layer 102 to effectively
respond under light loads while remaining secure under heavier
loads. The multiple tensile expansion members 122 include aligned
material. The material may be the flexible material used to
injection mold the support structure frame attachment, i.e., TPE's,
PP's, TPU's, or other flexible materials. The material may be
aligned using a variety of methods including compression and/or
tension aligning methods.
The multiple tensile expansion members 122 connect to multiple ends
142 of the multiple primary support rails 108 via the rail
attachment nodes 120. The multiple ends 142 of the multiple primary
support rails 108 may be cantilevered ends 142. The rail attachment
nodes 120 may define an opening 146 for connection to the
cantilevered ends 142 of each multiple primary support rail 108.
This connection may include a snap-fit connection, integrally
molding the multiple tensile expansion members 122 to the ends 142
of the primary support rails 108, or other connection methods.
The support structure frame attachment 112 in FIG. 1 may be
injection molded from a flexible material such as a thermal plastic
elastomer (TPE), including Arnitel EM400 or 460, a polypropylene
(PP), a thermoplastic polyurethane (TPU), or other soft, flexible
materials. The support structure frame attachment 112 may be
positioned around all or a portion of the perimeter of the macro
compliance layer 102. Accordingly, the suspended pixelated seating
structure 100 is suspended from the support structure frame.
The multiple primary support rails 108, multiple secondary support
rails 114, and multiple expansion control strands 110 shown in FIG.
1 may be injection molded from a stiff material, such as glass
fiber-reinforced polybutylene terephthalate (GF-PBT), glass
fiber-reinforced polyamide (GF-PA), or other firm materials.
The multiple primary support rails 108 shown in FIG. 1 include
multiple shafts 144 having four sides and the multiple ends 142.
The multiple primary support rails 108, however, may include
alternative geometries. For example, each of the multiple primary
support rails 108 may include a cylindrical shaft, as shown in
FIGS. 11 and 12. Alternatively, the multiple primary support rails
108 may include a series of nodes and/or tensile expansion members
defined along the primary support rails 108, as shown in FIG.
10.
As described above, the ends 142 of the multiple primary support
rails 108 may be cantilevered ends 142, as shown in FIG. 4, for
attachment to the support structure frame attachment 112.
Alternatively, the ends 142 of the primary support rails 108 may
define an opening for attachment to the multiple tensile expansion
members 122. As another alternative, the ends 142 may be integrally
molded to the support structure frame attachment 112. Further, the
ends 142 of the multiple primary support rails 108 may instead
connect to the support structure frame. As yet another alternative,
the support structure frame attachment 112 may be replaced by frame
springs such that the multiple primary support rails 108 are
suspended from the support structure frame via the frame springs.
The frame springs may be conventional springs or other spring
types.
FIG. 1 shows the multiple tensile expansion members 122 extending
from and attaching to the ends 142 of the multiple primary support
rails 108. In other examples, including in those described below,
the multiple tensile expansion members 122 may alternatively be
defined along the multiple primary support rails 108 and/or along
the multiple secondary support rails 114. In such examples the ends
142 of the multiple primary and/or secondary support rails 108 and
114 may connect to the support structure frame attachment 112.
Where the suspended pixelated seating structure 100 defines
multiple tensile expansion members 122 along the multiple primary
and/or secondary support rails 108 and 114, the macro compliance
layer 102, including the multiple primary and secondary support
rails 108 and 114 and multiple expansion control strands 110, may
be injection molded from the softer, flexible materials used to
form the support structure frame attachment 112 discussed
above.
Multiple tensile expansion members 122 defined along the multiple
primary and/or secondary support rails 108 and 114 may be aligned
using a variety of methods including compression and/or tension
aligning methods. For example, in examples where the multiple
tensile expansion members 122 are defined along the multiple
primary and secondary support rails 108 and 114, the aligned
portions defined along the multiple primary support rails 108 may
be compression aligned while the aligned portion defined along the
multiple secondary support rails 114 may be tension aligned, or
visa versa.
The alternative suspended pixelated seating structures discussed
below define the multiple tensile expansion members 122 along the
multiple primary support rails 108. In the examples discussed
below, the multiple tensile expansion members 122 may be defined
along substantially the entire length of the multiple primary
support rails 108 or as discrete aligned segments along the length
of the multiple primary support rails 108. In each alternative
example below, the multiple tensile expansion members 122 may
alternatively be included in the support structure frame attachment
112 in the manner shown in FIG. 1.
As the macro compliance layer 102 deflects downward when a load is
applied to the suspended pixelated seating structure 100, the
multiple primary support rails 108 may spread apart from each other
to facilitate adaptation to the load. The multiple expansion
control strands 110 provide for controlled separation of the
multiple primary support rails 108 to prevent the macro compliance
layer 102 from excess separation, such as when a heavier load is
applied. The multiple expansion control strands 110 may be
non-linear, as shown in FIG. 1. In this manner, the multiple
expansion control strands 110 can provide slack for the separation
of the multiple primary support rails 108.
The amount of slack provided by the multiple expansion control
strands 110 may be tuned in a variety of ways. For example, the
number and/or degree of bends in the multiple expansion control
strands 110 may affect the amount of slack provided. In addition,
varying the type of material used to form the multiple expansion
control strands 110 may affect the amount of slack. The multiple
expansion control strands 110 may alternatively be linear, as
shown, for example, in FIG. 15.
FIG. 1 shows the multiple expansion control strands 110 connected
between the ends 142 of each adjacent primary support rail 108.
Alternatively, the multiple expansion control strands 110 may
connect between less than all adjacent primary support rails 108.
For example, the multiple expansion control strands 110 may connect
between every other set of adjacent primary support rails 108. The
multiple expansion control strands 110 may also connect between
adjacent primary support rails 108 at multiple positions along the
length of the multiple primary support rails 108, as shown, for
example, in FIG. 10.
The multiple secondary support rails 114 may provide further
support to the suspended pixelated seating structure 100. In
particular, the multiple primary and secondary support rails 108
and 114 support the multiple spring elements 124 of the micro
compliance layer 104. The multiple spring elements 124 may be
secured on adjacent primary support rails 108 and on adjacent
secondary support rails 114 via the spring attachment members 130.
The spring attachment members 130 may be integrally molded to the
primary and secondary support rails 108 and 114, may attach via a
snap-fit connection, or may be secured using other methods.
The macro compliance layer 102 may or not be pre-loaded. For
example, prior to connecting the macro compliance layer 102 may
initially be formed, such as through the injection molding process,
with a shorter length than is needed secure the macro compliance
layer 102 to the support structure frame. Before securing the macro
compliance layer 102 to the support structure frame, the macro
compliance layer 102 may be stretched or compressed to several
times its original length. As the macro compliance layer 102
settles down after being stretched, the macro compliance layer 102
may be secured to the support structure frame when the macro
compliance layer 102 settles to a length that matches the width of
the support structure frame.
As another alternative, the macro compliance layer 102 may settle
down and then be repeatedly re-stretched until the settled down
length of the macro compliance layer 102 matches the width of the
support structure frame. The macro compliance layer may be
pre-loaded in multiple directions, such as along its length and/or
width. In addition, different pre-loads may be applied to different
regions of the macro compliance layer 102. Applying different
pre-loads according to region may be done in a variety of ways,
such as by varying the amount of stretching or compressing at
different regions and/or varying the thickness of different
regions.
FIG. 1 shows an example of the micro compliance layer 104 in which
the multiple spring elements 124 are four sided tower springs. The
four sided tower spring is described below and shown in FIGS. 5 and
6. The multiple spring elements 124 shown in FIG. 1 have an
approximate length and width of 40 mm.times.40 mm and an
approximate height of 16 mm. However, each of the multiple spring
elements 124 may include alternative dimensions according to a
variety of factors including the spring element's 124 relative
location in the suspended pixelated seating structure 100, the
needs of a specific application, or according to a number of other
considerations. For example, the height may be varied to provide a
three-dimensional contour to the suspended pixelated seating
structure 100, providing a dish-like appearance to the suspended
pixelated seating structure 100. In this example, the height of the
multiple springs elements 124 positioned in the center portion of
the micro compliance layer 104 may be less than the height of the
multiple spring elements 124 positioned at the outer portions of
the micro compliance layer 104, with a gradual or other type of
increase in height in the multiple spring elements 124 between the
center and outer portions of the micro compliance layer 104.
Alternatively, the micro compliance layer 104 may include a variety
of other spring types. Examples of other spring types, as well as
how they may be implemented in a suspended pixelated seating
structure, are described below and shown in FIGS. 9-18. The spring
types used in the micro compliance layer 104 may include
alternative orientations. For example, the spring types may be
oriented upside-down, relative their orientation described in this
application. In this example, the portion of the spring described
in this application as the top would be oriented towards and
connect to the macro compliance layer. Further, in this example the
deflectable members may connect to the load support layer. The
deflectable members may connect to the load support layer via
multiple spring attachment members However, the examples discussed
in this application do not constitute an exhaustive list of the
spring types, or possible orientations of spring types, that may be
used to form the micro compliance layer 104. The spring elements
124 may exhibit a range of spring rates, including linear,
non-linear decreasing, non-linear increasing, or constant rate
spring rates. FIG. 7 shows a plot of the approximate non-linear
decreasing spring rate for the four side tower spring 124.
The micro support layer 104 connects on the macro compliance layer
102. In particular, the spring attachment members 130 connect on
the multiple primary support rails 108 and in some examples, on the
multiple secondary support rails 114. This connection may be an
integral molding, a snap fit connection, or other connection
method. The multiple spring elements 124 may be injection molded
from a TPE, such as Arnitel EM460, EM550, or EL630, a TPU, a PP, or
from other flexible materials. The multiple spring elements 124 may
be injection molded individually or as a sheet of multiple spring
elements 124.
As the micro compliance layer 104 includes multiple substantially
independent deflectable elements, i.e., the multiple spring
elements 124, adjacent portions of the micro compliance layer 104
may exhibit substantially independent responses to a load. In this
manner, the suspended pixelated seating structure 100 not only
deflects and conforms under the "macro" characteristics of the
applied load, but also provides individual, adaptable deflection to
"micro" characteristics of the applied load.
The micro compliance layer 104 may also be tuned to exhibit varying
regional responses in any particular zone, area, or portion of the
support structure to provide specific support for specific parts of
an applied load. The regional response zones may differ in
stiffness or any other load support characteristic, for example.
Certain portions of the suspended pixelated seating structure 100
may be tuned with different deflection characteristics. One or more
individual pixels which form a regional response zone, for example,
may be specifically designed to a selected stiffness for any
particular portion of the body. These different regions of the
suspended pixelated seating structure 100 may be tuned in a variety
of ways. As described in more detail below with reference to the
load support layer 106, variation in the spacing between the lower
surface of each pixel 132 and the macro compliance layer 102
(referring to the spacing measured when no load is present) may
vary the amount of deflection exhibited under a load. The regional
deflection characteristics of the suspended pixelated seating
structure 100 may be tuned using other methods as well, including
using different materials, spring types, thicknesses, geometries,
or other spring characteristics for the multiple spring elements
124 depending on their relative locations in the suspended
pixelated seating structure 100.
The load support layer 106 connects to the micro compliance layer
104. The lower surface of each pixel 132 is secured to the top 126
of a corresponding spring element 124. This connection may be an
integral molding, a snap fit connection, or other connection
method. The lower surface may connect to the top 126 of the spring
element 124, or may include a stem 136 or other extension for
resting upon or connecting to the spring elements 124. The top 126
of each spring element 124 may define an opening for receiving the
stem 136 of the corresponding pixel. Alternatively, the top 126 of
each multiple spring element 124, or of any other type of spring
element described below, may include a stem or post for connecting
to an opening defined in the corresponding pixel.
Whether the lower surface of each pixel 132 includes a stem 136 may
depend on the type of spring element 124 used, a predetermined
spring deflection level, and/or other characteristics or
specifications. When a load presses down on the load support layer
106, the multiple pixels 132 press down on the tops 126 of the
multiple spring elements 124. In response, the multiple spring
elements 124 deflect downward to accommodate the load. As the
multiple spring elements 124 deflect downward, the lower surfaces
of the multiple pixels 132 move toward the macro compliance layer
102. One or more multiple spring elements 124 may deflect far
enough such that the lower surfaces of the corresponding pixels 132
abut on top of the macro compliance layer 102. In this instance,
the spring element 124 corresponding to the pixel 132 whose lower
surface abuts with the macro compliance layer 102 may not deflect
further, relative to itself.
The amount of deflection exhibited by the spring element 124 before
the lower surface of the corresponding pixel 132 abuts on top of
the macro compliance layer 102 is the spring deflection level.
Relative to ground, however, the multiple spring elements 124 may
deflect further in that the micro compliance layer 104 may deflect
downward under a load as the macro compliance 102 layer deflects
under a load. As such, the multiple spring elements 124 may
individually deflect under a load according to the spring
deflection level, and may also, as part of the micro compliance
layer 104, deflect further as the micro compliance layer 104 bends
downward under a load.
The spring element 124 may stop deflecting under a load when the
lower surface of the pixel 132 abuts on top of some portion of the
micro compliance layer 104 such as on top of the multiple spring
attachment members 130. This may be the case where the spring
attachment members 130 are positioned above the macro compliance
layer 102, such as in the suspended pixelated seating structure 100
shown in FIG. 1.
The spring deflection level may be determined before manufacture
and designed into the suspended pixelated seating structure 100.
For example, the suspended pixelated seating structure may be tuned
to exhibit an approximately 25 mm of spring deflection level. In
other words, the suspended pixelated seating structure 100 may be
designed to allow the multiple spring elements 124 to deflect up to
approximately 25 mm. Thus where the micro compliance layer 104
includes spring elements 124 of 16 mm height (i.e., the distance
between the top of the macro compliance layer 102 and the top 126
of the spring element 124), the lower surfaces of the multiple
pixels 132 may include a 9 mm stem. As another example, where the
micro compliance layer 104 includes spring elements 124 of 25 mm
height, the lower surfaces of the multiple pixels 132 may omit
stems; but may rather connect to the tops 126 of the multiple
spring elements 124. As explained above, the height of each spring
element 124 may vary according to a number of factors, including
its relative position within the suspended pixelated seating
structure 100.
The multiple pixels 132 may be interconnected with multiple pixel
connectors 148. The L-shaped element shown in FIG. 1 is a cross
sectional portion of a pixel connector 148. Accordingly, FIG. 1
shows the multiple pixels 132 interconnected at their sides via the
multiple pixel connectors 148. The load support layer 106 may
include a variety of pixel connectors 148, such as planar or
non-planar connectors, recessed connectors, bridged connectors, or
other elements for interconnecting the multiple pixels 132, as
described below. The multiple pixel connectors 148 may be
positioned at a variety of locations with reference to the multiple
pixels 132. For example, the multiple pixels connectors 148 may be
positioned at the corners, sides, or other positions in relation to
the multiple pixels 132. The multiple pixel connectors 148 provide
an increased degree of independence as between adjacent pixels 132,
as well as enhanced flexibility to the load support layer 106. For
example, the multiple pixel connectors 148 may allow for flexible
downward deflection, as well as for individual pixels 132 to move
or rotate laterally with a significant amount of independence.
The multiple pixels 132 may define openings 138 within the pixels
132 for added deflection of the suspended pixelated seating
structure 100. The openings 138 allow for added flexibility and
adaptation by the multiple pixels 132 when placed under a load. The
openings 138 may also be defined within the multiple pixels 132 to
enhance the aesthetic characteristics of the suspended pixelated
seating structure 100.
The load support layer 106 may be injection molded from a flexible
material such as a TPE, PP, TPU, or other flexible materials. In
particular, the load support layer 106 may be formed from
independently manufactured pixels 132, or may be injection molded
as a sheet of multiple pixels 132. The load support layer 106 may
also connect to a support structure via support structure
connection elements, as is described below and shown, for example,
in FIG. 23.
When under a load, the load may contact with and press down on the
load support layer 106. Alternatively, the suspended pixelated
seating structure 100 may also include a seat covering layer
secured above the load support layer 106. The seat covering layer
may include a cushion, fabric, leather, or other seat covering
materials. The seat covering layer may provide enhanced comfort
and/or aesthetics to the suspended pixelated seating structure
100.
FIG. 2 shows a broader view of the suspended pixelated seating
structure 100 shown in FIG. 1. While FIG. 2 shows a rectangular
suspended pixelated seating structure 100, the suspended pixelated
seating structure 100 may include alternative shapes, including a
circular shape. The support structure frame attachment 112 may be
positioned around all or a portion of the perimeter of the
suspended pixelated seating structure 100.
FIG. 3 shows a portion of the macro compliance layer 102. As noted
above in connection with FIG. 1, the macro compliance layer 102
includes the multiple primary support rails 108, multiple secondary
support rails 114, and multiple expansion control strands 110. The
multiple primary support rails 108 include multiple cantilevered
ends 142 for attachment to the support structure frame
attachment.
The multiple primary support rails 108 are aligned substantially in
parallel, but may adhere to other alignments depending on the
desired implementation. The multiple primary support rails 108 may
be of equal length, or of varying lengths. For example, the length
of the multiple primary support rails 108 may vary where the
suspended pixelated seating structure 100 is designed for
attachment to a circular support structure.
The multiple secondary support rails 114 extend between adjacent
primary support rails 108, but contact with one primary support
rail 108. Alternatively, the multiple secondary support rails 114
may vary in length, including extending the entire distance between
and contacting adjacent primary support rails 108. As another
alternative, the suspended pixelated seating structure 100 may omit
secondary support rails 114. The secondary support rails 114 may be
linear or non-linear. Non-linear secondary support rails may
function as expansion control strands to provide for controlled
separation of the multiple primary support rails 108 when a load is
imposed.
FIG. 4 shows the support structure frame attachment 112. As
described above, the support structure frame attachment 112
includes the frame attachment rail 116, the multiple frame
connectors 118, and the multiple rail attachment nodes 120. The
support structure frame attachment 112 also includes the multiple
tensile expansion members 122 connected between the multiple rail
attachment nodes 120 and the frame connectors 118. FIG. 4 shows
circular openings 140 and 146 defined within the multiple frame
connectors 118 and multiple rail attachment nodes 120 respectively.
These openings 140 and 146 may alternatively include other
geometrically shaped openings.
As described above, the macro compliance 102 layer may include the
support structure frame attachment 112 for connection to the
support structure frame; but may alternatively omit the support
structure frame attachment 112 in connecting to the support
structure frame. Further, the support structure frame attachment
112 may omit the multiple tensile expansion members 122, which may
alternatively be defined, for example, along the multiple primary
support rails 108.
FIG. 5 shows a four sided tower spring 500. The four sided tower
spring 500 includes a top 502, a deflectable member 504, and
multiple spring attachment members 506. The top 502 connects to or
supports the lower surface of a pixel of the load support layer.
The top 502 may define an opening 508 to facilitate the connection
or interaction with a portion of a pixel.
The deflectable member 504 shown in FIG. 5 includes four angled
sides 510. The angled sides 510 connect to the top 502 of the
spring member 124 and angle downward from the top 502 toward
bottoms 512 of the angled sides 510. The deflectable member 504 may
define gaps 514 between the adjacent angled sides 510. In FIG. 5,
each gap 514 begins at the top 502 of the spring member 124 and
widens along the length of the angled sides 510. The deflectable
member 504 may also define deflection slits 516 along the angled
sides 510. The deflection slits 516 may begin at some point between
the top 502 of the spring member 124 and the bottoms 512 of the
angled sides 510, where the width of each deflection slit 516
gradually widens downward toward the bottom 512 of the angled sides
510. The gaps 514 defined between adjacent angled sides 510, as
well as the deflection slits 516 defined along the angled sides
510, help facilitate deflection of the spring 500 under a load.
The four sided tower spring 500 may be tuned with varying
deflection characteristics depending on where they are positioned
within the micro compliance layer. Varying one or more of the
design characteristics of the spring 500 may tune the spring
element's deflection characteristics, such as spring rate.
The following are examples of design variations that may be used to
tune the four sided tower spring 500 to exhibit certain deflection
characteristics. The slope, length, thickness, material and/or
width of the angled sides 510 may vary. The angled sides 510 may
not define a deflection slit 516, or alternatively, may define the
deflection slit 516 beginning closer or farther from the top 502 of
the spring 500. Similarly, the deflectable member 504 may not
define gaps 514 between adjacent angled sides 510, or
alternatively, may define the gaps 514 beginning farther from the
top 502 of the four sided tower spring 500. Other variations in
design characteristics of the spring element 124 may also affect
the spring's 500 responsiveness to a load.
At the bottoms 512 of the angled sides 510 the deflectable member
504 bends upwards and connects to the spring attachment members 506
for connection to the macro compliance layer. The spring attachment
members 506 include a planar surface 512 in FIG. 5, but may
alternatively include a non-planar, contoured, or other surface
geometry. As described above, this connection may be an injection
molding, a snap fit connection, or other connection method.
FIG. 6 shows the four sided tower spring 500 deflecting under a
load. When a load is applied to the load support layer, the lower
surface of each pixel presses downward onto the top 502 of the
corresponding four sided tower spring 500. The deflectable member
504 bends to accommodate the load as the top 502 of the spring 500
is pressed downward. As described above, the gaps 514 and
deflection slits 516 facilitate deflection under a load. For
example, as the four sided tower spring 500 deflects under a load,
the gaps 514 widen in response. Different initial gap 514
dimensions may be selected, among other deflection characteristics,
to determine how far the four sided tower spring 500 deflects, as
well as how much resistance to deflection the spring's 500 own
structure may provide.
FIG. 7 shows a plot 700 of the approximate spring rate of the four
sided tower spring 500. The plot 700 shows a non-linear decreasing
spring rate 702 determined from a finite element analysis.
According to the plot 700, the force required to deflect the four
sided tower spring 500 initially increases substantially linearly
with respect to displacement, but substantially levels off when a
designed amount of displacement has been achieved.
FIG. 8 shows a top view of the macro and micro compliance layers of
a suspended pixelated seating structure 800. FIG. 8 shows multiple
tensile expansion members 802 defined along multiple primary
support rails 804. The multiple tensile expansion members 802 may
be defined along the entire length, or a substantial portion, of
the multiple primary support rails 804, as shown in FIG. 8.
Alternatively, the multiple tensile expansion members 802 may be
defined along discrete segments of the multiple primary support
rails 804, such as in FIG. 15. The macro compliance layer includes
the multiple primary support rails 804, a support structure frame
attachment 806, and multiple secondary support rails 808 extending
between and contacting adjacent multiple primary support rails
804.
The support structure frame attachment 806 includes a frame
attachment rail 810 and frame connectors 812 defined along the
frame attachment rail 810. The frame connectors 812 shown in FIG. 8
are openings 812 defined along the frame attachment rail 810, but
may alternatively be cantilevered elements or other elements for
connecting the suspended pixelated seating structure 800 to the
support structure frame. The support structure frame attachment 806
also includes multiple support rail connectors 814 for connecting
the support structure frame attachment 806 to the multiple primary
support rails 804. This connection may be an integral molding, snap
fit connection, or other connection method.
As discussed above, where the macro compliance layer includes
multiple tensile expansion members 802 defined along the multiple
primary support rails 804, the macro compliance layer may be
injection molded from the more flexible materials, such as TPE's,
TPU's, PP's, or other materials described as being used to form the
support structure frame attachment shown in FIG. 1.
The multiple tensile expansion members 802 may be defined along the
entire length of the multiple primary support rails 804, or along
segmented portions of the multiple primary support rails 804.
Alternatively, the multiple tensile expansion members 802 may be
defined along the multiple secondary support rails 808 instead of,
or in addition to, being defined along the multiple primary support
rails 804.
The multiple spring elements shown in FIG. 8 are the four sided
tower springs 500 described above. The spring attachment members
506 may include multiple spring connectors 816. In FIG. 8, the
multiple spring connectors 816 are openings defined within the
spring attachment members 506. The openings 816 may correspond to
multiple support rail connectors 818 defined along the multiple
primary and/or secondary support rails 804, 808. The multiple
spring connectors 816 and multiple support rails connectors 818 may
be openings, protrusions, or other elements for connecting the four
sided tower springs 500 to the multiple primary and/or secondary
support rails 804, 808. The multiple spring connectors 816 and
multiple support rails connectors 818 may facilitate this
connection through an integral molding, snap fit connection, or
other connection method.
FIG. 9 shows a coil spring 900. The micro compliance layer may
include one or more coil springs 900 as the multiple spring
elements. The coil spring 900 includes a top 902, deflectable
member 904, and spring attachment members 906. The top may define
an opening 908 for connection to a load support layer. The
deflectable member 904 includes spiraled arms 904 which spiral from
the top 902 of the spring element down to the spring attachment
members 906. Other sizes, shapes, and geometries of deflectable
member may be additionally or alternatively implemented. FIG. 9
shows elliptically shaped coil springs. The coil springs 900 may
alternatively include other geometries, such as a circular
geometry.
Under a load, the top 902 of the coil spring 900 is pressed down
and the coil spring 900 deflects or compresses in response. The
coil spring 900 may exhibit an approximately linear or non-linear
spring rate. As described above with reference to the four sided
tower spring 500, the deflection characteristics of the coil spring
900 may be tuned for various applications. For example, variation
in pitch, thickness, length, degree of curvature, material, or
other spiraled arm design characteristics may be selected to tune
the deflection characteristics of the coil spring 900 for any
desired stiffness or responsiveness. FIG. 9 shows the coil spring
900 having different major and minor diameters, with the diameter
of the coil spring gradually decreasing from the bottom (major
diameter) towards the top (minor diameter). The coil spring 900 may
alternatively include a substantially uniform diameter throughout
the height of the coil spring 900 or may include other alternative
variations in diameter.
FIG. 10 shows a portion of a suspended pixelated seating structure
1000 in which the multiple spring elements are coil springs 900.
The pixelated seating structure includes a macro compliance layer
1002, a micro compliance layer 1004, and a load support layer. The
macro compliance layer 1002 includes multiple primary support rails
1006 and a support structure frame attachment 1008. The macro
compliance layer 1002 also includes multiple tensile expansion
members 1010 and multiple nodes 1012 defined along multiple primary
support rails 1006. The nodes 1012 include posts 1014 for
connection to the micro compliance layer 1004. The macro compliance
layer 1002 further includes multiple expansion control strands 1016
extending between adjacent primary support rails 1006. The support
structure frame attachment 1008 includes a frame attachment rail
1018 and multiple frame connectors 1020. The multiple frame
connectors 1020 in FIG. 10 include multiple openings 1020 defined
along the frame attachment rail 1018 for connection to a support
structure frame.
Each of the multiple expansion control strands 1016 include a
U-shaped bend 1022 to allow slack for the controlled separation of
adjacent primary support rails 1006 when under a load. The multiple
expansion control strands 1016 may alternatively be linear. In
other examples, the macro compliance layer 1002 may omit the
multiple expansion control strands 1016. The bend 1022 may be
varied to provide different amounts of slack, such as by changing
the number of bends 1022, the degree of curve in the bends 1022,
the length of the bends 1022, the material from which the bends
1022 are made, or other design characteristics.
FIG. 10 shows the multiple coil springs 900 positioned above the
multiple expansion control strands 1016. Alternatively or
additionally, one or more coil springs 900 may be positioned above
the space 1024 defined between adjacent primary support rails 1006
and adjacent expansion control strands 1016.
The micro compliance layer 1004 includes the multiple coil springs
900 and multiple deflection control runners 1026. The multiple
deflection control runners 1026 connect to and extend between
spring attachment members 906 of adjacent coil springs 900. The
multiple deflection control runners 1026 may run substantially
parallel to the multiple primary support rails 1006. The multiple
deflection control runners 1026 include multiple bends 1028 for
controlled deflection of the suspended pixelated seating structure
1000. The multiple deflection runners 1026 may alternatively be
linear, or may be omitted from the micro compliance layer 1004. The
multiple deflection control runners 1026 may also be varied, such
as by changing the number of multiple bends 1028, the degree of
curve in the multiple bends 1028, the length of the bends 1028, the
material from which the bends 1028 are made, or other design
characteristics.
FIG. 10 shows multiple deflection control runners 1026 positioned
over every other primary support rail 1006. The deflection control
runners 1026 may be positioned over all primary support rails 1006,
or over some smaller number of primary support rails 1006.
Additionally, the deflection control runners 1026 may run
continuously along the length of the corresponding primary support
rail 1006, or may run along the length of the corresponding primary
support rail 1006 in discrete segments.
As the suspended pixelated seating structure 1000 deflects down
under a load, the multiple tensile expansion members 1010 allow
expansion along the length of the multiple primary support rails
1006. The multiple deflection control runners 1026 straighten as
the multiple primary support rails 1006 deflect downward and become
taut when the multiple primary support rails 1006 have deflected by
a certain amount. The amount of deflection exhibited by the
multiple primary support rails 1006 before the multiple deflection
control runners 1026 tauten may be tuned by adjusting various
characteristics of the deflection control runners 1026, including
thickness, number of bends, degree of curve in the bends 1028, or
other characteristics.
Each coil spring 900 defines an opening 1030 in each of the
multiple spring attachment members 906 for receiving the multiple
posts 1014 protruding up from the multiple nodes 1012. The spring
attachment members 906 may connect to the multiple posts 1014 with
a snap fit connection, may be integrally molded, or may connect
through a variety of other connection methods. Alternatively, the
coil springs 900 may include multiple posts protruding down from
the spring attachment members 906 for connection to multiple
openings defined in the multiple nodes 1012.
FIG. 11 shows a broader view of the suspended pixelated seating
structure 1000 shown in FIG. 10. FIG. 10 shows a second support
structure frame attachment 1100 connected to the multiple primary
support rails 1006. A load support layer connects on the micro
compliance layer 1004.
FIG. 12 shows a squiggle spring 1200 connected between adjacent
primary support rails 1202 and adjacent secondary support rails
1204. The squiggle spring 1200 may be used as a spring element in
any of the seating structures. The squiggle spring 1200 includes a
top 1206 and a deflectable member 1208. The squiggle spring 1200
includes an opening 1210 defined within the top 1206 for connection
to a load support layer. The deflectable member 1208 includes a
shaft 1212 extending downward from the top 1206 and curved strands
1214 connected to and extending from the shaft 1212. The shaft 1212
includes a base 1216. The curved strands 1214 may connect to and
extend between the base 1216 of the shaft 1212 and, extending from
the base 1216 and connecting to the primary support rails 1202
and/or secondary support rails 1204. In FIG. 12, the curved strands
1214 are integrally molded between the base 1216 and the support
rails 1202 and 1204. The curved strands 1214 shown in FIG. 12
include an approximate 7 mm.times.3 mm thickness.
The curved strands 1214 include a multiple bends 1218. As the top
1206 of the squiggle spring 1200 is pressed down under a load, the
curved strands 1214 initially provide minimal resistance as the
spring 1200 deflects downward. The spring 1200 continues to deflect
downward until the curved strands 1214 become taut. When the curved
strands 1214 tauten, the force necessary to continue deflecting the
spring 1200 substantially increases. As such, the squiggle spring
1200 may provide a non-linear increasing spring rate. The spring
rate may be tuned for various application, such as by varying the
number of bends 1218 in the curved strands 1214, the degree of
curve in the bends 1218, the number of curved strands 1214
connected between the shaft 1212 and the multiple primary and/or
secondary support rails 1202, 1204, the thickness of the curved
strands 1214, or by varying other design characteristics.
The height of the shaft 1212 may vary as well. For example, where
the spring deflection level described above is defined as 25 mm,
the shaft 1212 may extend up to 25 mm above the macro compliance
layer. In this example, the top 1206 of the squiggle spring 1200
may connect to the lower surface of a corresponding pixel, rather
than connecting to a stem extending from the lower surface of the
pixel. Where the suspended pixelated seating structure includes a
load support layer including multiple stems, the height of the
shaft 1212 may be designed such that when connected, the combined
height of the shaft 1212 and corresponding stem equals the spring
deflection level.
FIG. 12 shows the shaft 1212 as a cylindrical shaft 1212. The
geometry of the shaft 1212, however, may vary. For example, the
shaft 1212 may extend from the top 1206 with no slope, or with some
amount of slope, giving the shaft 1212 a conical shape. The shaft
1212 may include other geometries or configurations as well.
FIG. 12 shows multiple expansion control strands 1220 extending
from the multiple primary support rails 1202 and multiple recessed
segments 1222 defined along the multiple primary support rails
1202. Each multiple expansion control strand 1220 may define an
opening 1224 for connection to the corresponding recessed segment
1222 of an adjacent primary support rail 1202. Each recessed
segment 1222 may also define an opening 1226 to facilitate this
connection. The multiple expansion control strands 1220 may be
non-linear.
FIG. 13 shows the top view of a portion of a suspended pixelated
seating structure 1300 where the multiple spring elements are
squiggle springs 1200. FIG. 14 shows an offset top view of the
portion of the suspended pixelated seating structure 1300 shown in
FIG. 13. The suspended pixelated seating structure using squiggle
springs 1200 includes multiple primary support rails 1202, multiple
secondary support rails 1204, and support structure frame
attachments 1302 connected at opposite ends of the primary support
rails 1202. The suspended pixelated seating structure 1300 also
includes multiple tensile expansion members 1304 defined along the
multiple primary support rails 1202. The squiggle springs 1200
shown in these Figures are integrally molded between adjacent
primary and secondary support rails 1202, 1204.
FIG. 15 shows a portion of a suspended pixelated seating structure
1500 where the micro compliance layer 1502 includes two sided tower
springs 1504. The two sided tower springs 1504 is another
alternative for the spring element. The suspended pixelated seating
structure also includes a macro compliance layer 1506 integrally
connected to the micro compliance layer 1502.
The macro compliance layer 1506 includes multiple primary support
rails 1508 and multiple expansion control strands 1510. FIG. 15
shows the primary support rails 1508 in cross-section, shown by the
planar sides 1512. The structure 1500 is a representative portion
of a larger suspended pixelated seating structure. The suspended
pixelated seating structure 1500 also includes multiple tensile
expansion members 1514 and multiple unaligned segments 1516 defined
along the multiple primary support rails 1508. The multiple
unaligned segments 1516 may alternatively be partially aligned,
such as what aligning may incidentally result from aligning other
portions of the multiple primary support rails 1508.
The multiple expansion control strands 1510 shown in FIG. 15 are
linear, but may alternatively be non-linear. The multiple expansion
control strands 1510 have an approximate thickness of 1.5 mm. This
thickness may be varied according to a number of factors, including
whether the multiple expansion control strands incorporate one or
more non-linear segments.
The two sided tower springs 1504 include a top 1518, a deflectable
member 1520 including two sides, and multiple spring attachment
members 1522. The two sided tower springs 1504 may define an
opening 1524 within the top 1518 for connection to the load support
layer. The sides of the deflectable member 1520 include bottoms
1526 connected to the spring attachment members 1522. The sides of
the deflectable member 1520 extend downwards from the top 1518
towards their respective bottoms 1526. The bottoms 1526 of the
deflectable member 1520 curve upward and connect to the spring
attachment members 1522. The spring attachment members 1522 are
integrally molded to the unaligned segments 1516 on adjacent
primary support rails 1508. Alternatively, the spring attachment
members 1522 may connect to the unaligned segments 1516 with a snap
fit connection or other connection method.
FIG. 16 shows a broader view of the portion of the suspended
pixelated seating structure 1500 shown in FIG. 15. FIG. 16 shows
the suspended pixelated seating structure 1500 further including
support structure frame attachments 1600 positioned at opposite
ends of the suspended pixelated seating structure 1500. FIGS. 17
and 18 respectively show a top view and a side view of the
suspended pixelated seating structure 1500 shown in FIG. 16.
FIG. 19 shows a portion of a load support layer 1900 that may be
used in a suspended pixelated seating structure. The load support
layer 1900 including multiple rectangular pixels 1902
interconnected at their corners with pixel connectors 1904. Each of
the multiple pixels 1902 includes an upper surface 1906 and a lower
surface. The multiple pixels 1902 are shown as rectangular, but may
take other shapes, such as hexagons, octagons, triangles, or other
shapes. The lower surface includes a stem 1908 extending from the
lower surface for connection to the micro compliance layer. Each
multiple pixel connector 1904 interconnects four pixels 1902 at
their respective corners. As described below and shown in FIGS.
21-22, the multiple pixel connectors 1904 may alternatively
interconnect the multiple pixels 1902 at their respective sides. As
yet another alternative, the multiple pixels 1902 may be arranged
in a brick pattern. In this alternative, the multiple pixel
connectors 1904 may interconnect three pixels at the corner of two
pixels and the side of a third pixel.
FIG. 19 shows the multiple pixel connectors 1904 as planar
surfaces, recessed below the upper surface 1906 of the multiple
pixels 1902. Alternatively, the multiple pixel connectors 1904 may
be non-planar and/or contoured. The multiple pixels 1902 may also
be positioned on even plane with the multiple pixels 1902.
The multiple pixels 1902 may define multiple openings 1910 within
each pixel. The openings 1910 begin near the center of the pixel
1902 and gradually widen toward the edge of each pixel. The
openings 1910 may add flexibility to load support layer 1900 in
adapting to a load. FIG. 19 shows a load support layer 1900
including eight triangular openings 1910 defined within each pixel.
The load support layer 1900, however, may define any number of
openings 1910 within each pixel 1902, including zero or more
openings 1910. Additionally, each pixel 1902 within the load
support layer 1900 may define a different number of openings 1910
or different sized openings 1910, depending, for example, on the
pixel's 1902 respective position within the load support layer
1900.
FIG. 19 shows circular connectors 1912, each defining an opening at
its center, positioned at the outside corners of the outside pixels
1902. The circular connectors 1912 may provide anchor points for
connecting the load support layer 1900 to the support structure.
The circular connectors 1912 may be replaced by the multiple pixel
connectors 1904 in other implementations.
FIG. 20 shows a side view of the load support layer 1900 shown in
FIG. 19. FIG. 20 shows the upper and lower surfaces 1906 and 2000
of the multiple pixels 1902. As described above, the lower surface
2000 of each pixel 1902 may define or include a stem 1908 extending
down toward the micro compliance layer. The stem 1908 includes a
shaft 2002 and flaps 2004 extending outward from the shaft 2002
along the length of the shaft 2002. The flaps 2004 may include a
cutoff bottom edge 2006 for abutment with the top of a
corresponding spring element. For example, the portion 2008 of the
shaft 2002 that extends beyond the cutoff bottom edge 2006 may
insert into an opening defined within the top of the spring element
until the cutoff bottom edge 2006 is flush with the top of the
spring element. In this manner, when a load is applied to the load
support layer 1900, the cutoff bottom edge 2006 presses down on the
top of the spring element. The length of the shaft 2002, or whether
a stem 1908 is included at all, may depend on the spring deflection
level, as described above.
FIG. 21 shows a load support layer 2100 including multiple
rectangular pixels 2102 interconnected at their sides via pixel
connectors 2104. The multiple pixel connectors 2104 include
U-shaped bends 2106 to provide slack for each pixel's 2102
independent movement when a load is applied. Other shapes, such as
an S-shape, or other undulating shape may be implemented for the
pixel connectors 2104. The multiple pixel connectors 2104 may help
reduce or prevent contact between adjacent pixels 2102 under
deflection. The load support layer 2100 may alternatively omit the
multiple pixel connectors 2104 to increase the independence of the
multiple pixels 2102. While FIGS. 19 and 21 show load support
layers 1900 and 2100 including rectangular pixels 1902 and 2102, a
load support layer may alternatively include circular, triangular,
or other shaped pixels. The multiple pixels 2102 may also include
alternative arrangements, including a brick pattern, such as the
brick pattern arrangement described above.
FIG. 22 shows a side view of the load support layer 2100 shown in
FIG. 21. FIG. 22 shows stems 2200 similar to the stems 1908
described above with reference to FIG. 20. Other stem types may be
used as well. For example, the end of the stem 2200 may define an
opening for receiving a stem extending upwards from the top of the
spring element. As described above, a lower surface 2202 of the
pixel may omit a stem 2200, but rather connect to the top of the
spring element.
FIG. 23 shows a load support layer 2300 including multiple
contoured pixels 2302. The load support layer 2300 also includes
multiple bridged connectors 2304 to facilitate the connections
between adjacent pixels 2302. In the example shown in FIG. 23, the
bridged connectors 2304 are positioned at the corners of the pixels
2302, but may alternatively be located at the sides of the pixels
2302. The bridged connectors 2304 are described in more detail
below and a close up of one bridge connector 2304 is shown in FIG.
26.
The contoured pixels 2302 may provide enhanced flexibility,
aeration, and/or aesthetics to the load support layer 2300 and are
described in more detail below and shown in FIG. 25. The contoured
pixels 2302 may include stems, such as the stems 1908 and 2200
described above, for connecting to a micro compliance layer.
FIG. 24 shows a side view of the load support layer 2300 shown in
FIG. 23. FIG. 24 shows the multiple contoured pixels 2302 including
stems 2400 extending downward for connecting to a micro compliance
layer.
FIG. 25 shows a close up of one of the contoured pixels 2302 shown
in FIG. 23. The contoured pixel 2302 includes a pair of convex
shaped sides 2500 and a pair of concave shaped sides 2502. The
contoured pixels 2302 are positioned such that every other pixel
2302 is rotated ninety degrees. In this manner the convex shaped
sides 2500 of one pixel 2302 are adjacent to the concave shaped
sides 2502 of an adjacent pixel 2302, and visa versa.
The contoured pixel 2302 may define multiple openings 2504 within
the contoured pixel 2302 with a strip 2506 running between the
openings 2504. The strip 2506 running between the openings 2504
provides added flexibility to the pixel. The strip 2506 may be a
non-linear strip 2506 (e.g., an undulating, S-shaped, U-shaped, or
other shape strip). In implementations in which the contoured pixel
2302 includes the stem 2400 for connecting to a micro compliance
layer, the stem 2400 may connect to the center of the strip 2506
and extend downward toward the top of the corresponding spring
element. The contoured pixel 2302 includes a hinge 2508 running
perpendicular to the strip 2506 for enhanced compliance when a load
is applied. The hinge 2508 may be defined by a cut-out portion of
the lower surface of the contoured pixel 2302 to enhance the
flexibility of the contoured pixel 2302.
FIG. 26 shows four pixels 2600-2606 connected via the bridged
connector 2304 shown in FIG. 23. The bridged connector 2304
includes a left U-shaped connector 2608, a right U-shaped connector
2610, and a bridge strip 2612. The left and right U-shaped
connectors 2608 and 2610 connect between the upper left and lower
left pixels 2600 and 2602 and the upper right and lower right
pixels 2604 and 2606 respectively. The left and right U-shaped
connectors 2608 and 2610 bend downward, forming a left and a right
U-shaped bend 2614 and 2616 respectively. The bridge strip 2612
includes cantilevered ends 2618. The cantilevered ends 2618 connect
above the left and right U-shaped bends 2614 and 2616, forming a
bridge between the two U-shaped bends 2614 and 2616. FIG. 26 shows
a substantially linear bridge strip 2612. The bridge strip 2612 may
alternatively be non-linear.
The bridged connectors 2304 provide an increased degree of
independence as between adjacent pixels 2600-2606, as well as
enhanced flexibility to the load support layer 2300. For example,
the bridged connectors 2304 not only allow for flexible downward
deflection, but also allow for individual pixels 2302 to
independently move laterally in response to a load.
FIG. 27 shows a side view of a suspended pixelated seating
structure 2700 including multiple bolstering support members 2702.
The multiple bolstering support members 2702 may provide increase
responsiveness to a load at the outer portions of the suspended
pixelated seating structure 2700, such as at the portions of the
suspended pixelated seating structure 2700 that connect to a
support structure frame 2718. When a load is applied, the multiple
bolstering support members 2702 may deflect downward, allowing for
increased response to a load at the outer portions of the suspended
pixelated seating structure 2700. In this manner, the bolstering
support members 2702 may allow for increased comfort and support
provided by the suspended pixelated seating structure 2700.
The suspended pixelated seating structure includes a macro
compliance layer 2704, a micro compliance layer 2706, and a load
support layer 2708. The macro compliance layer 2704 includes
multiple primary support rails 2710, with multiple nodes 2712 and
multiple tensile expansion members 2714 defined along the multiple
primary support rails 2710. The micro compliance layer includes
multiple spring elements 2716. FIG. 27 shows the suspended
pixelated seating structure 2700 including multiple coil springs as
the multiple spring elements 2716. The suspended pixelated seating
structure 2700, however, may use other spring types, such as the
spring types described above.
Each bolstering support member 2702 includes an angled pad 2720.
Each bolstering support member 2702 may also include multiple
connectors 2722 for connecting the bolstering support member 2702
to the macro and micro compliance layers 2704 and 2706. The
connectors 2722 may include cantilevered elements, openings defined
in the angled pad, or other elements for connecting the bolstering
support members to the macro and micro compliance layers 2704 and
2706. While FIG. 27 shows only connectors 2722 for connecting the
bolstering support member 2702 to the macro compliance layer 2704,
other examples of the bolstering support member 2702 may include
connectors 2722 for connecting the bolstering support member 2702
to the micro compliance layer 2706. Alternatively, the macro and
micro compliance layers 2704 and 2706 may connect directly to the
angled pad 2718. These connections may be a snap fit connection, an
integral molding, or other connection method.
The bolstering support member is positioned between the outer
portion of the macro compliance layer 2704 and the outer portion of
the micro compliance layer 2706. For example, in FIG. 27, the
bolstering support member 2702 is connected above the outer nodes
2712 of the multiple primary support rails 2710 via multiple
connectors 2722, and connected below the spring elements 2716
positioned at the outer portion of the micro compliance layer 2706.
The bolstering support member 2702 is positioned such that the
angled pad 2720 angles upwards and outwards (relative to the macro
compliance layer 2704) from the outer nodes 2712 to which the
bolstering support member 2702 is connected. The degree of slope
exhibited by the angled pad 2720 may be tuned according to the
desired comfort and support characteristics of the suspended
pixelated seating structure 2700.
The multiple spring elements 2716 may be connected along all or a
portion the entire length of the upper surface of the angled pad
2720. The connection between the bolstering support member 2702 and
the macro and micro compliance layers 2704 and 2706 may be an
integral molding, a snap fit connection, or other connection
method. In this manner, the angled pad 2720 may deflect downward
when a load is applied, thus providing increased deflection at the
outer portions of the suspended pixelated seating structure
2700.
While various embodiments of the invention have been described, it
will be apparent to those of ordinary skill in the art that many
more embodiments and implementations are possible within the scope
of the invention. For example, the springs may be implemented as
any resilient structure that recovers its original shape when
released after being distorted, compressed, or deformed.
Accordingly, the invention is not to be restricted except in light
of the attached claims and their equivalents.
* * * * *
References